'''Gunderamova odbrana'''<ref>[{{Cite web |url=http://www.bangorchessclub.org.uk/Gameplay/openings/eco/listeco/show_pos?ECO=1019 |title=Bangor Chess Club] |accessdate=19 Oktobar 2013 |archiveurl=https://web.archive.org/web/20120216090121/http://www.bangorchessclub.org.uk/Gameplay/openings/eco/listeco/show_pos?ECO=1019 |archivedate=16 Februar 2012 |url-status=dead }}</ref><ref>[http://www.chess-theory.com/enva0299c40_links_chess_theory_eco_codes_base.php Chess-Theory.com OPENINGS THEORY - ECO CODES BASE C40]</ref> je rijetko igrano [[šahovsko otvaranje]] koje karakteriziraju potezi:
:'''1. e4 e5'''
:'''2. Sf3 De7'''
Nazvana je po [[šah]]istu Gerhardu Gunderamu.<ref>[{{Cite web |url=http://www.geocities.com/siliconvalley/lab/7378/opening.htm |title=Bill Wall's list of chess openings |accessdate=28 Oktobar 2009 |archiveurl=https://web.archive.org/web/20091028034035/http://www.geocities.com/siliconvalley/lab/7378/opening.htm Bill|archivedate=28 Wall'sOktobar list2009 of|url-status=dead chess openings]}}</ref><ref>[http://www.chessarch.com/library/0000_eco/c40.shtml Chess Archaeology: Openings classified under ECO C40]</ref> U [[EŠO|Enciklopediji šahovskih otvaranja]] nalazi se pod kodom C40.
